<template>
  <div class="login">
    <el-form
      ref="loginRef"
      :model="loginForm"
      :rules="loginRules"
      class="login-form"
    >
      <h3 class="title">若依后台管理系统</h3>
      <el-form-item prop="username">
        <el-input
          v-model="loginForm.username"
          type="text"
          size="large"
          auto-complete="off"
          placeholder="账号"
        >
          <template #prefix>
            <svg-icon icon-class="user" class="el-input__icon input-icon" />
          </template>
        </el-input>
      </el-form-item>
      <el-form-item prop="password">
        <el-input
          v-model="loginForm.password"
          type="password"
          size="large"
          auto-complete="off"
          placeholder="密码"
          @keyup.enter="handleLogin"
          show-password
        >
          <template #prefix>
            <svg-icon icon-class="password" class="el-input__icon input-icon" />
          </template>
        </el-input>
      </el-form-item>
      <el-form-item prop="code" v-if="captchaEnabled">
        <el-input
          v-model="loginForm.code"
          size="large"
          auto-complete="off"
          placeholder="验证码"
          style="width: 63%"
          @keyup.enter="handleLogin"
        >
          <template #prefix>
            <svg-icon
              icon-class="validCode"
              class="el-input__icon input-icon"
            />
          </template>
        </el-input>
        <div class="login-code">
          <img :src="codeUrl" @click="getImageCode" class="login-code-img" />
        </div>
      </el-form-item>
      <el-checkbox
        v-model="loginForm.rememberMe"
        style="margin: 0px 0px 25px 0px"
      >
        记住密码
      </el-checkbox>
      <el-form-item style="width: 100%">
        <el-button
          :loading="loading"
          size="large"
          type="primary"
          style="width: 100%"
          @click.prevent="handleLogin"
        >
          <span v-if="!loading">登 录</span>
          <span v-else>登 录 中...</span>
        </el-button>
        <div style="float: right" v-if="register">
          <router-link class="link-type" :to="'/register'">
            立即注册
          </router-link>
        </div>
      </el-form-item>
    </el-form>
    <!--  底部  -->
    <div class="el-login-footer">
      <span>Copyright © 2017-2025 mingcai All Rights Reserved.</span>
    </div>
  </div>
</template>

<script setup lang="ts">
import { ref, getCurrentInstance } from 'vue'
import { useRouter } from 'vue-router'
import { getCodeImg } from '@/api/login'
import type { ICodeModel, IUserModel } from '@/model/userModel'
import Cookies from 'js-cookie'
import { encrypt, decrypt } from '@/utils/jsencrypt'
import useUserStore from '@/store/modules/user'

const userStore = useUserStore()
const router = useRouter()
const { proxy } = getCurrentInstance() as any

const loginForm = ref<IUserModel>({
  username: 'admin',
  password: 'admin123',
  rememberMe: false,
  code: '',
  uuid: '',
})

const loginRules = {
  username: [{ required: true, trigger: 'blur', message: '请输入您的账号' }],
  password: [{ required: true, trigger: 'blur', message: '请输入您的密码' }],
  code: [{ required: true, trigger: 'change', message: '请输入验证码' }],
}

const codeUrl = ref('')
const loading = ref(false)
// 验证码开关
const captchaEnabled = ref(true)
// 注册开关
const register = ref(false)
const redirect = ref(undefined)

function handleLogin() {
  proxy.$refs.loginRef.validate((valid: any) => {
    if (valid) {
      loading.value = true
      // 勾选了需要记住密码设置在 cookie 中设置记住用户名和密码
      if (loginForm.value.rememberMe) {
        Cookies.set('username', loginForm.value.username, { expires: 30 })
        Cookies.set('password', encrypt(loginForm.value.password).toString(), {
          expires: 30,
        })
        Cookies.set('rememberMe', loginForm.value.rememberMe.toString(), {
          expires: 30,
        })
      } else {
        // 否则移除
        Cookies.remove('username')
        Cookies.remove('password')
        Cookies.remove('rememberMe')
      }
      // 调用action的登录方法

      userStore
        .login(loginForm.value)
        .then(() => {
          router.push({ path: redirect.value || '/' })
        })
        .catch(() => {
          loading.value = false
          // 重新获取验证码
          if (captchaEnabled.value) {
            getImageCode()
          }
        })
    }
  })
}

function getImageCode() {
  getCodeImg().then((res: ICodeModel) => {
    captchaEnabled.value =
      res.captchaEnabled === undefined ? true : res.captchaEnabled
    if (captchaEnabled.value) {
      codeUrl.value = 'data:image/gif;base64,' + res.img
      loginForm.value.uuid = res.uuid
    }
  })
}

/**
 * 从cookie中加载用户信息
 * username: 用户名
 * password: 密码
 * rememberMe: 是否记住密码
 * 1. 优先从cookie中加载
 * 2. 如果cookie中无数据,则使用默认值
 */
function loadCookie() {
  const username = Cookies.get('username')
  const password = Cookies.get('password')
  const rememberMe = Cookies.get('rememberMe')

  let decrypted_pwd: string = ''
  if (password !== undefined) {
    let output = decrypt(password)
    if (typeof output === 'string') {
      decrypted_pwd = output
    }
  }
  loginForm.value = {
    username: username === undefined ? loginForm.value.username : username,
    password: decrypted_pwd !== '' ? decrypted_pwd : loginForm.value.password,
    rememberMe: rememberMe === undefined ? false : Boolean(rememberMe),
  }
}

getImageCode()
loadCookie()
</script>

<style lang="scss" scoped>
.login {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
  background-image: url('../assets/images/login-background.jpg');
  background-size: cover;
}

.title {
  margin: 0px auto 30px auto;
  text-align: center;
  color: #707070;
}

.login-form {
  border-radius: 6px;
  background: #ffffff;
  width: 400px;
  padding: 25px 25px 5px 25px;

  .el-input {
    height: 40px;

    input {
      height: 40px;
    }
  }

  .input-icon {
    height: 39px;
    width: 14px;
    margin-left: 0px;
  }
}

.login-tip {
  font-size: 13px;
  text-align: center;
  color: #bfbfbf;
}

.login-code {
  width: 33%;
  height: 40px;
  float: right;

  img {
    cursor: pointer;
    vertical-align: middle;
  }
}

.el-login-footer {
  height: 40px;
  line-height: 40px;
  position: fixed;
  bottom: 0;
  width: 100%;
  text-align: center;
  color: #fff;
  font-family: Arial;
  font-size: 12px;
  letter-spacing: 1px;
}

.login-code-img {
  height: 40px;
  padding-left: 12px;
}
</style>
